Airplane-propelling mechanism



Dec. 3l, 1929. F. HEIDBREDER n 1,741,517

' AIRPLANE PROPELLING uEcHANIsu l Y Filed Nov. 16. 192'? 2 Sheets-Sheet1 ATTORNEY ed ez'eeglwmg..

Dec. 3l, 1929. F. HEIDBREDER AIRPLANE PROPELLING HECHANISH Filed Nov. 161927 2 fSheets-Sheet 2 immun Il l WITNESS:

ATTOR N EY Patented Dec. 31, 1929 PATENT" OFFICE FRED HEIDBREDER, FQUINCY, ILLINOIS AIRPLANE-PROPELLING MECHANISM Application filedNovember 16, 1927. Serial No.v 238,688.

The present invention relates to airplane propelling mechanism and hasfor its object the improvement of mechanism of this character. 'Morespecifically, it is an object of the invention to provide a propellerthat can be placednear the center of gravity of the machine on'which litis mounted and also at the center of resistance to the medium throu hwhich the propeller is traveling.

lo A fiirther object is to provide a propeller so constructed that whenin operation the slip stream will be directed to the side of the machineand will not inconvenience the operator of said machine.

A further object is to provide a propeller so arranged that air may betaken in .at the front of the machine and forced out through nozzles atthe rear of the machine.

A further object is to provide a propeller which may be adapted to the.propulsion of all manner of vehicles, either water or land vehicles.

Further objects are simplicity of construction and o eration,adaptability to the propulsion o various vehicles, cheapness omanufacture and cheapness of installation.

Other objects and advantages will appear from the following descriptionand will be set forth in the subjoined claim', and I do' not wisl.`- tobe limited in the scope of my inventionexcept as I shall be limited bysaid claim.

In the drawings: v Figure 1 is a side elevation, showing the inventionattached to the drive shaft of an airplane, the forward end -of theairplane being shown fragmentarily.

Figure 2 is a rear elevation ofthe invention per' se, showing the driveshaft of the airplane in section. 4 l

z Figure 3 is a section on the line 33 of Figure 1, showing the internalconstruction of the device, looking in the direction of the arrows.

Figure 4 is a section on the same line lookin in the opposite direction.

igure 5 is a section at right angles to the section shownin Figures 3and 4, on the line 5-5 of Figure .4. l

5 Referring to the drawings in detail, 10

designates an airplane, 11 is a drive shaft thereof, and 12 is thepropeller casing which constitutes a part of the present invention. Thecasing is preferably cylindrical in shape and is divided into twocompartments by a partition 13 extending from the peripheral walls andlying in a radial plane. This partition is provided with a centralopening 14 in alignment with central openings 15 and 16 in the front andrear walls 17 and 18 of the casing. The openings 14, 15 and 16 arepreferably circular in shape and the opening 14 is of considerablygreater diameter than that ofthe openings 15 and 16. The partition 13divides the interior of the casing into two substantially equalcompartments each of which is provided with an outlet 19 which arearranged on diametrically opposite sides of the casing and are directedin a rearwardly direction.

Mounted within the casing and concentrically arranged relative theretois a propeller shaft 20 having spokes 21 extending radially therefrom,upon which are mounted f the propeller blades 22, the propeller bladesVbeing provided with notches 23 adapted to receive therein the partition13, whereby the propeller blades may extend to substantially the fulldiametrical width of the casing and operate to draw in air from bothsides of the casing and force it through the nozzles 19 rearwardly alongthe sides of the machine. The nozzles may be extended to reach the rearof the machine if so desired. For purposes of brevity and illustrationsuch extensions are not shown, as the construction thereofwould beobvious to anyone skilled in the art. y

The blades 22 ma be attached to the spokes 21 in any suita le manner, asby being 90 riveted thereto, and the casing 12 may made in two sectionshaving apertured flanges 24 and 25 thereon, whereby they may bedetachably connected together by bolts .26 to facilitate assembling anddisassembling the device.

In operation, the propeller shaft 20 may be attached as by a tongue andkerf connection7 as shown at 27 in Figure 5, to the drive shaft 1170i anairplane, or of any other 2 l angel? vehicle as may be desired. 'lllieengine oi the vehicle being set in motion, 'the shaft 11 transmitsrotary movement of the ian within f the casing, the propeller easing i2being held stationary lby brackets 28 securing the same to the framel ofthe vehicle. Upon the rota tion of the shaft the propeller blades willbe rotated, drawing lin air/or other uid, clepending on the medium inwhich the vehicle is moving, through the apertures and 16 anddischarging 1t with great forcethrough the nozzles 19, therebypropelling the inachine in a forward direction. Having described myinvention, what claim is:

A propeller adapted to be attached to a vehic e and having a propellershaft adapted to be connected with the drive shaft of the vehicle,'saidpropeller shaft having radially 2g extending propeller blades, a casingsurrounding said propeller blades and having a. radially extendingpartition having a central opening therein, said propeller blades havingperipheral notches therein to receive said partition, said casinghaving' front and rearopenings in alignment with the opening in thepartitiom' and nozzles connected peripherally with said casing andcommunieating therewith respectively on opposite sides of the partition,said nozzles being both directed rearwardly at diametrically oppositepoints of said casing.

In testimony whereof I afiix my signature.

` FRED HEIDBREDER

